That single dependency made or broke the entire system. Agent configuration that is user config dependent creates a chain of logic that defines behavior, performance, and reliability. When the agent waits for instructions from a user-defined configuration, every choice in that file becomes part of the runtime DNA. Ignore that, and you end up chasing bugs that aren't in the code but in the config.
Good design starts with clarity about what the agent needs to know and when it needs to know it. That means mapping every parameter the agent reads from the user config, every trigger that changes states, and every fallback that keeps it from stalling. The most efficient systems treat the config as the single point of truth. The worst ones let the agent guess.
Version control is not optional here. User config dependency means changes can ripple instantly through live agents. Use explicit defaults, track schema changes, and reject invalid entries before they hit production. Always assume a user will create the exact edge case you forgot to test.
Performance tuning in a user config dependent setup starts with reading frequency. An agent that parses the config too often will stall under load; one that barely checks it will miss critical updates. The smartest setups cache parsed configs, validate them in-memory, and only re-check when a hash changes.